Tonight Apple released iOS 6.1 for our iDevices, but at the same time it seems to have blocked the possibility to save SHSHs to iOS 6.0.x. Practically, if at the moment you try to restore to iOS 6.0.1 or iOS 6.0.2, iTunes it should display an error telling you that the respective build is not eligible for installation. According to iH8sn0w, iOS 6.1 is the only version of iOS 6.1 for which Apple still allows performing restores, but if you have nothing to do, you can test iTunes.
Normally, Apple gives users a few days to restore to a previous version of the recently published one, but now everything seems to have changed.
